Heel-press.



F. V. HART.

HEEL PRESS.

APPLICATION FILED NOV-B, x911.

Patented Oct. 15, 1918.

1 W7-ZW rr TT FRED v. HART, 0E L NN, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, To

U ITED SHOE MACHINERY co PoEATmN, OF rATEEsoN, NEW JERSEY, A conno- RA'IION OF NEW JERSEY.

HEEL-PRESS.

Application filed November 8, 1917.

This invention relates to heel pressing machines and more particularly to that type of heel pressing machine in which heels, or heel plles, newly built of layers or lifts pasted together, are held under pressure during the drying or setting ofthe paste.

Before explaining the novel features of of the present invention it is particularly pointed out that in this specification the term heel lift is used inclusively to de ignate the pieces of material, of whatever nature they may be, that are utilized as the components of the heel being built, and the term heel block is used to designate the product obtained by piling the pasted lifts prior to the compressing operation, that is, either the freshly pasted heel pile, which is a wet or green heel block, or the dry, pressed heel pile ready for the heel compressing operation, in order to distinguish this article from the commercial heel blank which is the product of the heel compressor.

Heel presses of the type in question em-. ploy a plurality of individual clamps within which the heel blocks to be pressed are placed. The faces of the oppositely facing press plates of each clamp are formed with interrupted surfaces in order to prevent an undue adherence of the heel blocks thereto, as described, and claimed broadly, in my co-pending application Serial No, 83,837, filed March 18, 1916. The invention defined insaid co-pending application shows the interrupted surfaces as produced by grooving the press plates, the grooves being so formed in each plate that w en the block engaging faces are oppositely disposed on the clamp the grooves in one plate will be parallel to the grooves in the other plate. It is desirable to form the grooves in the lower plate in such relation that they will run in the Specification of Letters Patent.

Patented Oct. 15, 1918.

Se ia 200,893-

direction of travel of the heel blocks as they are pushed within the clamp, because when us grooves do. not interfere with an easy and smooth introduction of the block. In pressing wedge heel blocks, the blocks are pushedinto the clamps breast first, as the upper clamping plate is hung on a transverse pivot so that it can tilt to accommodate itself to the angle formed between the heel seat and tread face of such blocks. If the grooves of the upper clamping plate are parallel to those of the lower plate it will be apparent to those skilled in the art that the clamp will not always be effective to hold a heel block in place under the clamping pressure. For example, with wedge heel blocks the twosets-of parallel grooves form in effect, a track or slide, which permits the heel blocks when the wedge form is pronounced, to be squeezed out of the clamps by the heavy pressure from below.

The object of the present invention is to provide a press of the kind in question which will be effective to hold in place both even heel blocks and wedge heel blocks. The feature of the invention by which this object is attained will be explained in the following description of the invention and then particularly pointed out in the appended claims.

The invention is illustrated as an improvement upon the heel pressing machine illustrated and described" in the co-pending application of Erastus E. Winkley, Serial No. 156,824, filed March 23, 1917, but those skilled in the art will recognize that its utility is not limited to the presses of that particular machine.

In the accompanying drawings illustrating the preferred form of the invention, Figure 1 is a partial plan view of certain of the heel clamps used in the machine of said Winkley application; Fig. 2 is a vertical section through one of the clamps, showing also a portion of the clamp carrier, taken on the line 22 of Fig. 1; Fig. 3 is a perspective showing the heel block engaging face of the upper press plate, detached; and Fig. 4 is a perspective showing the heel block engaging face of the lower press plate, detached, it being noted that the press plates of Figs. 3 and l are shown in the relative position which they assume when mounted in clamping position in the machine.

In the embodiment of the invention illustrated in'the drawings, the endless carrier, which sustains the individual clamps, is shown as comprising upper, intermediate, and lower annular members 5, 7 and 9, respectively, the intermediate member 7 being provided with webbed spokes 11 united in a central hub (not shown) which may turn upon a vertical pivot. The lower member 9 is suspended from the intermediate member 7, in rigid parallel relation therewith, by uprights 13 projecting from the member 9 and fixed, at their upper ends, to the member 7. The two members 7 and 9 support the lower press plates 15 of the clamps, while the upper member 5 supports the upper press plates 17 of the clamps.

The upper member 5 is sustained on the intermediate member 7 by a series of rods 19, received through inwardly-projecting perforated lugs 21, and threaded into the intermediate member 7. The lugs 21 rest on collars 23 fixed on the rods, and at their upper extremities the rods are provided with heads 25 which engage the upper surfaces of the lugs. In this manner the carrier member 5 is supported firmly at a fixed, but adjustable, distance above the member 7,

and this distance may be adjusted, in order,

that the clamps may be opened by a mini- -mum movement of the lower press plates,

by rotating the rods 19. In order-that all of the rods 19 may be adjusted simultaneously and equally, through a rotation of any one of them, each of the collars 23 is provided with sprocket-teeth 27 about which a sprocket chain 29 passes.

The upper press plates 17 are mounted in the upper carrier member 5 with pro 7 vision for a pivoted or rocking movement to accommodate the clamp to such angularity as may exist between the heel seat face and tread face of the heel blocks to be pressed. For this purpose the carrier member 5 is I provided with a pair of concave seats 31 (see dotted lines Fig. 1) for each upper press plate 17, while the plate itself is provided with a pair of convex bosses 33 (one of which is shown in Fig. 2) which rest in the seats. A lug 35 on each. press plate 17 projects upwardly from between the bosses 33 and extends through a slot 37 in the carrier member. The plate is secured loosely in place by a cross pin 39 through the lug. The lug thus slides freely in the slot to permit a tilting movement of accommodation in the press plate.

The lower press plates 15 are movable toward and from the upper plates to cl amp while the clamp is closed.

carrier members 7 and 9. A spring 43, surrounding each stem, is seated, at its lower end, upon the lower carrier member 9, while its upper end presses against the lower press plate and tends to raise the latter. The heel block in the clamp is thus subjected to a constant pressure from the'spring The pressure of the spring 43 is overcome, and the clamp opened, by downward pressure being applied to an inwardly projecting arm 45 C211" ried by each stem 41, which, when no heel block is in the press, limits the upward movement of the press plate 15 by engaging the lower side of the'carrier member 9.

Each arm 45 is held on its stem 41 by a nut 47.

All of the parts just described may, if deare not smooth, but the surface is inter-' rupted, as are the press plate faces in my co-pending application hereinbefore referred to. the faces is provided by parallel grooves, but when the plates are oppositely'disposed in clampingrelation, the grooves 49 of the lower press plate 15 are arranged at an angle to the grooves 51 of the upper press plate 17 preferably a right angle. With this construction, as best shown in Fig. 2, the furrowed face 51 acts as a lock to prevent a wedge heel block from being squeezed out of'the clamp by pressure from the spring 43. This construction of the clamps has been found to be extremely effective in maintaining wedge heel blocks in pressure position within the clamps.

The machine is operated in the same manner as the machine of said co-pending Winkley application, the lower clamping plate 15 is lowered, within theframe, and a heel block is slid thereupon, usually heel seat down, along the longitudinally arranged grooves 49. Thereafter pressure on the arm Preferably the interruption of' and the pressure of the spring causes the transversely arranged grooves 51, or other conformation forming the interrupted surface of the plate, to press upon and prevent movement of the heel block in a longitudinal direction. With the press plate formation described, wedge heel blocks of all degrees are held firmly in position while the clamps are advanced by a forward movement of the clamp carrier, as in machines of the type of said co-pending Winkley application.

The preferred form of the invention having been described, its scope will be found de ned in the following claims.

What is claimed as new, is:

1. A heel press, having, in combination, a clamp comprising opposed press plates both of Which have interrupted heel block engaging faces consisting of alternate ridges and depressions, the lines of said interrupted surfaces on one plate being at an angle to the lines of said interrupted surface on the other plate, and means for closing said clamp on a heel block.

2. A heel press, having, in combination, a clamp comprising opposed press plates one of which may tilt relative to the other to accommodate for Wedge heel blocks, said tilting plate having an interrupted heel block engaging face consisting of ridges and depressions acting to prevent undue adhesion between the block and the plate and the lines of which run substantially parallel to the axis about which the plate tilts, and means for closing said clamp on a heel block.

3. A heel press, having, in combination, a clamp comprising opposed press plates both of which have grooved heel block engaging faces, the grooves in one plate runing in the direction in which the heel block travels when introduced to the clamp and the grooves in the other plate running at a substantial angle to the grooves in its opposed plate, and means for closing said clamp 011 a heel block.

4:. In a heel pressing machine, pressure producing mechanism comprising opposed press plates having furrowed heel block engaging faces acting to prevent undue adhesion between the block and plates, the furrows on one plate extending at right angles, substantially, to the furrows on the other plate.

5. In a heel pressing machine, pressure producing mechanism comprising opposed press plates one of which may tilt relative to the other to accommodate for wedge heel blocks, the block engaging faces of both plates being furrowed to prevent undue adhesion between the block and plates; the furrows on one of the plates extending substantially parallel to the axis about which the tilting plate has its movement.

FRED V. HART.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

